# How do you find phi in spherical coordinates?

## How do you find phi in spherical coordinates?

The coordinates used in spherical coordinates are rho, theta, and phi. Rho is the distance from the origin to the point. Theta is the same as the angle used in polar coordinates. Phi is the angle between the z-axis and the line connecting the origin and the point.

## What are R theta and phi in spherical coordinates?

Spherical coordinates (r, θ, φ) as commonly used in physics (ISO 80000-2:2019 convention): radial distance r (distance to origin), polar angle θ (theta) (angle with respect to polar axis), and azimuthal angle φ (phi) (angle of rotation from the initial meridian plane). The symbol ρ (rho) is often used instead of r.

**Can phi be negative in spherical coordinates?**

you want to let θ to from 0 to 2π and φ go from 0 to π, otherwise the sin(φ) factor can be negative.

### How are the coordinates expressed in a spherical coordinate system?

In summary, the formulas for Cartesian coordinates in terms of spherical coordinates are x=ρsinϕcosθy=ρsinϕsinθz=ρcosϕ.

### What is phi direction?

So remember that, according to Cylindrical Coordinate System’s convention, Phi (ϕ) must be traced in Anticlockwise direction. That is, your path of tracing should be along +X to +Y to -X to -Y to +X. And, if you trace the angle in clockwise direction viz.

**Does phi go from 0 to pi?**

Note the subtle change: ϕ is from 0 to 2π and θ is from 0 to 1π. If you plug this in to the grapher, you find that what you get resembles a sphere. However, when you integrate p2sin(ϕ) over p from 0 to 1, ϕ from 0 to 2π, and θ from 0 to π, you get 0.

#### How do you evaluate a triple integral in spherical coordinates?

To evaluate a triple integral in spherical coordinates, use the iterated integral ∫θ=βθ=α∫ρ=g2(θ)ρ=g1(θ)∫u2(r,θ)φ=u1(r,θ)f(ρ,θ,φ)ρ2sinφdφdρdθ.

#### Why Theta varies from 0 to pi in spherical coordinates?

It’s because the area you are looking for is a product of the and components, not and the angle .